I used strips of polycarbonate layed under the formerly teak (now starboard) pieces that cover the running rails of the companionway slide. You can do the same and keep the teak:
I also cut out a skylight that is overlayed with smoked lexan where I formerly had teak. I like a lot of maintenance free plastic on my "chlorox bottle",- anyway ...polycarbonate for the runners as a glide surface. 'take care and joy, Aythya crew